Year	metric tons
1961	1154036
1962	1197986
1963	1114783
1964	1204778
1965	1280304
1966	1226909
1967	1321156
1968	1171504
1969	1251614
1970	1182055
1971	1388548
1972	1207049
1973	1094380
1974	1625233
1975	1405459
1976	1330336
1977	1579301
1978	1590856
1979	1427413
1980	1591163
1981	1635400
1982	1599271
1983	1427493
1984	1721389
1985	1761623
1986	1659635
1987	1624676
1988	1821064
1989	1713646
1990	1638290.92
1991	1552857.03
1992	2232595.9400000004
1993	2645977.23
1994	2477163.5
1995	2517176.7
1996	2872219.7100000004
1997	2736814.95
1998	2426630.4
1999	2401672.52
2000	2526393.59
2001	2614482.02
2002	2280121.3400000003
2003	2483995.41
2004	2547600.43
2005	2701809.2100000004
2006	2691940.2199999997
2007	2663002.39
2008	2812919.9499999997
2009	3168150.4999999995
2010	3190919.8600000003
2011	3009840.6300000004
2012	3369806.380000001
2013	3529900.6500000004
2014	3794175.46
2015	4283682
2016	3178476.7899999996
2017	3990105.03
2018	3476893.33
2019	4012057.8899999997
2020	4275152.029999998
2021	3774717.3100000005
2022	4168220.5500000003